fsl/fman: fix dereference null return value (05720546) · Commits · 戴 / test

Check before using returned value to avoid dereferencing null pointer. Fixes: ("fsl/fman: Add FMan Port Support") Signed-off-by:

drivers/net/ethernet/freescale/fman/fman_port.c

+8 −1

Original line number	Diff line number	Diff line
		@@ -1767,6 +1767,7 @@ static int fman_port_probe(struct platform_device *of_dev)
		struct fman_port *port;
		struct fman *fman;
		struct device_node fm_node, port_node;
		struct platform_device *fm_pdev;
		struct resource res;
		struct resource *dev_res;
		u32 val;
		@@ -1791,8 +1792,14 @@ static int fman_port_probe(struct platform_device *of_dev)
		goto return_err;
		}

		fman = dev_get_drvdata(&of_find_device_by_node(fm_node)->dev);
		fm_pdev = of_find_device_by_node(fm_node);
		of_node_put(fm_node);
		if (!fm_pdev) {
		err = -EINVAL;
		goto return_err;
		}

		fman = dev_get_drvdata(&fm_pdev->dev);
		if (!fman) {
		err = -EINVAL;
		goto return_err;